Dating parker duofold pens
Patent N 1,904,358, applied for on September 14, 1928 and issued on April 18, 1933) from Professor Arthur O.
Although the pump mechanism was novel, Dahlberg’s design was not entirely original; it was an extension of Huston Taylor’s 1905 bulb-filler patent (U. Caps and blind caps alternated colored rings with black; initally, the pen was offered with barrel either colored and black or colored and clear (so that the user could see how much ink remained).
Slender models and an astonishing variety of miscellaneous sizes, such as desk pens, ring-tops, and fat vest-pocket models, were also available.
These two desk pens, from 1939 (above) and 1941 (below), both have Speedline fillers; but they show a remarkable variation in their exterior designs.
(The metal tassie into which the jewel was set was made of brass.) Thereafter, only streamlined blind caps were produced for the Vacumatic and Duofold product lines.
As it happened, the new look was more streamlined — and the buying public, conditioned to expect cutbacks due to the exigencies of all-out war (and ready to sweep Art Deco under the rug anyway), seems not to have objected to the loss of that small bit of trim.
The total range of sizes produced over the Vacumatic’s lifetime is broad enough that assembling a comprehensive list would be nearly impossible.(Some Speedline models had “bullseye” blind-cap jewels rather than striated.) Colored jewels were phased out with the advent of the single-jewel models.As noted earlier, during the 1940s Parker used the basic architecture of the Vacumatic to create the Striped Duofold.In addition to a striking clip design and a jewel-like striated body, higher-line models of the Vacumatic featured a palladium-plated nib.The Junior, dressed in celluloid designs of marbled colors, Shadow Wave, Crystal, and the famous “Golden Web” (called simply by Parker), bore a plain gold nib, and gradually the gold nib appeared on striated pens such as the Major. Their attractive appearance and the fact that they are less common make plated nibs more desirable; and because the plating wears as the nib is rubbed to clean it, plated nibs in good condition are highly prized.